The State Fire Marshal's Office says the boy suffered burns on 50 percent of his body, including his upper torso, neck and arms. He was taken by helicopter to a hospital and was in critical condition after the accident Friday morning.

Authorities say the boy was at the Savage River State Forest with his mother, who was inside a tent at the time of the accident. Investigators found that the boy went outside and ignited a sparkler, which caused his shirt to catch fire.

State Fire Marshal Brian Geraci is urging parents to keep fireworks out of the reach of children.